afa659732e
Limitations: Only supports simple 8.3 file names Cannot create with size > 0 Timestamp is bogus
56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
/*
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* Copyright (c) 2015 Steve White
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* Copyright (c) 2022 Travis Geiselbrecht
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*
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* Use of this source code is governed by a MIT-style
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* license that can be found in the LICENSE file or at
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* https://opensource.org/licenses/MIT
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*/
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#pragma once
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#include <lk/compiler.h>
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#include <lib/bio.h>
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#include <lib/fs.h>
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#include "fat_fs.h"
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// Individual files should
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// #define LOCAL_TRACE FAT_GLOBAL_TRACE(0)
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// can override here for all fat files
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#define FAT_GLOBAL_TRACE(local) (local | 0)
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typedef void *fsfilecookie;
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/* file allocation table parsing */
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uint32_t fat_next_cluster_in_chain(fat_fs *fat, uint32_t cluster);
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uint32_t file_offset_to_cluster(fat_fs *fat, uint32_t start_cluster, off_t offset);
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/* general io routines */
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uint32_t fat_sector_for_cluster(fat_fs *fat, uint32_t cluster);
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ssize_t fat_read_cluster(fat_fs *fat, void *buf, uint32_t cluster);
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// general directory apis outside of an object
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struct dir_entry {
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fat_attribute attributes;
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uint32_t length;
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uint32_t start_cluster;
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// TODO time
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};
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// used as a key for a file/dir in the open file table
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struct dir_entry_location {
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uint32_t starting_dir_cluster;
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uint32_t dir_offset;
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};
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inline bool operator==(const dir_entry_location &a, const dir_entry_location &b) {
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return (a.starting_dir_cluster == b.starting_dir_cluster && a.dir_offset == b.dir_offset);
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}
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// walk a path, returning the entry and the location where it was found
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status_t fat_dir_walk(fat_fs *fat, const char *path, dir_entry *out_entry, dir_entry_location *loc);
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// walk a path, allocating a new entry with the path name.
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// returns the dir entry location
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status_t fat_dir_allocate(fat_fs *fat, const char *path, fat_attribute attr, uint32_t starting_cluster, uint32_t size, dir_entry_location *loc);
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